Tuesday, May 27, 2008

[MW:804] Re: [piping_valves] Selection of Gasket/Stud for SS#CS Flanges


Gasket selection which is quit a big subject is in addition to what Raghu has pointed out, also linked eitherway with flange selection and the type of facing etc. which does not have any fool proof solution and near perfect guidelines. Based on practical experience from the plants in operation the plant owners have defined thier own practice after experimenting with different rational options and in addition by the closing reports of various pilot plants. Which has been adapted by major engineering companies and is being passed on to other companies. Also everyone may be knowing that the weakest connection is a flange connection in a pipeline.

Coming to the situation of Zameer, is a default situation in any process plant. The BEP (Best engg. practice) would be to follow the worst case / stringent side of the piping class. In this case the SS flange side piping class definitions shall be applied. Also the contract docs. never define these common scenarios. The same applies to a piping of 300# is connected with a 150# rating piping. The 150# rating piping shall be welded with a 300# flange and bolted with the 300# rating piping on the other side.

I cannot envisage a situation where a equipment nozzle is SS and the connected piping is of CS material. If so pl. review with your process dept.

With regards,
Kannan




"Bathula Raghuram \(Mumbai - PIPING\)" <r.bathula@ticb.com>
Sent by: piping_valves@yahoogroups.com

27/05/2008 08:04

Please respond to
piping_valves@yahoogroups.com

To
<materials-welding@googlegroups.com>
cc
<piping_valves@yahoogroups.com>
Subject
[piping_valves] Selection of Gasket/Stud for  SS#CS Flanges





Gasket selection mainly depend on Temperature and Pressure of the media, Corrosive nature and Criticality of the application

Since you are using 316 in place of A105, u may use the similar combination of gasket, studs used for a CS#CS joint in the same process stream (since design conditions are same), unless you have contractual requirements if any.


From: Zameer Mohammed [mailto:dreamthinkwork@gmail.com]
Sent:
Tuesday, May 27, 2008 10:47 AM
To:
materials-welding@googlegroups.com
Subject:
SS & CS Flanges

 

Dear Friends,

We have 2 mating flanges, one is SS316 and another is A105. Can I connect SS Flange with CS Flange? In this case, what type of Gaskets, Stud Bolts & Nuts we can use?

For all other CS flanges we are using spiral wound gaskets.

Thank you,

Regards,

 

Sabir

__._,_.___
Messages in this topic (1) Reply (via web post) | Start a new topic
Messages

Change settings via the Web (Yahoo! ID required)
Change settings via email:
Switch delivery to Daily Digest | Switch format to Traditional
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
Visit Your Group
Yahoo! Groups

Familyographer Zone

Join a group and

share your pictures.

Cat Zone

on Yahoo! Groups

Join a Group

all about cats.

Special K Group

on Yahoo! Groups

Join the challenge

and lose weight.

.

__,_._,___

--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
-~----------~----~----~----~------~----~------~--~---

No comments:

[MW:34820] RE: 34813] Clarification in Rate of heating and cooling.

Hello,   Please see the response below.   Regards.   P. Goswami, P. Eng, IWE.   From: materials-welding@googlegroups.com <materials-weld...